Are they bag in a box? Starting from the top:
Orchard Pig Explorer - Seem to remember this one has a minor farmy smell but was nice to drink.
Orchard Pig Philosopher - A bit stronger, tamer aroma, again nice to drink.
Thatchers Cheddar Valley - Very cloudy, deep orange. Nice pint but some are put off by the colour.
Thatchers Heritage - Slightle weak flavour I found, although I had some recently in the Tap & Spile and it was better than I remembered so maybe I just tried a few duff pints.
Westons Old Rosie - Scrumpy, not my ideal pint TBH but others seem to like it.
Westons Rosies Pig - Similar to Old Rosie but less funky, Seemed to go down well with a mate visiting from Australia recently (but they can only get strongbow!)
Westons Twist Mulled - Excellent served warm at Christmas, not sure there is a need for it other than in winter though.
All in all any of them would do fine, I'd probably prefer the Orchard Pig Philosopher from that list but will drink any. My least favourite is Old Rosie, but I've seen that do well in places so......
I would say though, are bottles a better option? They keep for a lot longer and take less shelf space, you'd only need one row of each til you found one the locals like. These boxes take a full shelf in the fridge, you could have a range of half a dozen bottles in that space. Depends on what is available obviously, but may be an idea til you know what the locals like?